Only Microsoft can come up with something so user unfriendly as this.
I use OneDrive. I have a folder. I need to share that folder with someone to work together. I find a share option, type their email, expect to share it. It doesn't work. Like I didn't share anything. I don't even know if one of us is using "business one drive" and the other "personal one drive". Why should I know this?!?

I wouldn't try to share OneDrive folder to someone using GoogleDrive. Or to someone's DropBox. But for duck sake, I expect, if there is an option to "share" in OneDrive to be able to share with OTHER ONEDRIVE USERS.

If they are different products, and not the same WHY FOR DUCK SAKE GIVING THEM THE SAME NAME!?!?!"#%!#"